Synthesis of recyclable SERS platform based on MoS2@TiO2@Au heterojunction for photodegradation and identification of fungicides

Qingyi Wei; Qirong Dong; Da-Wen Sun; Hongbin Pu

doi:10.1016/j.saa.2022.121895

Synthesis of recyclable SERS platform based on MoS₂@TiO₂@Au heterojunction for photodegradation and identification of fungicides

Spectrochim Acta A Mol Biomol Spectrosc. 2023 Jan 15:285:121895. doi: 10.1016/j.saa.2022.121895. Epub 2022 Sep 17.

Authors

Qingyi Wei¹, Qirong Dong¹, Da-Wen Sun², Hongbin Pu¹

Affiliations

¹ School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China.
² School of Food Science and Engineering, South China University of Technology, Guangzhou 510641, China; Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou 510006, China; Food Refrigeration and Computerized Food Technology (FRCFT), Agriculture and Food Science Centre, University College Dublin, National University of Ireland, Belfield, Dublin 4, Ireland. Electronic address: dawen.sun@ucd.ie.

PMID: 36228505
DOI: 10.1016/j.saa.2022.121895

Abstract

Surface-enhanced Raman spectroscopy (SERS) substrates based on metal/semiconductors have attracted much attention due to their excellent photocatalytic activity and SERS performance. However, they generally exhibit low light utilization and photocatalytic efficiencies. Herein, molybdenum disulfide coated titanium dioxide modified with gold nanoparticles (MoS₂@TiO₂@Au) as a heterojunction-based recyclable SERS platform was fabricated for the efficient determination of fungicides. Results showed that the MoS₂@TiO₂@Au platform could rapidly degrade 90.7% crystal violet in 120 min under solar light irradiation and enable reproducible and sensitive SERS analysis of three fungicides (methylene blue, malachite green, and crystal violet) and in-situ monitor of the photodegradation process. The platform could also be reused five times due to the unique integrated merits of the MoS₂@TiO₂@Au heterojunction. Meanwhile, experiments in determining methylene blue in prawn protein solution achieved a limit of detection of 1.509 μg/L. Therefore, it is hoped that this work could expand detection applications of photocatalytic materials.

Keywords: Fungicide; MoS(2)@TiO(2)@Au; Photocatalysis; Recyclable; SERS.

MeSH terms

Fungicides, Industrial* / analysis
Gentian Violet / analysis
Gold / chemistry
Metal Nanoparticles* / chemistry
Methylene Blue / chemistry
Molybdenum / chemistry
Photolysis

Substances

titanium dioxide
Gold
Fungicides, Industrial
Molybdenum
Methylene Blue
Gentian Violet